Meni (Menachem) Brief · Applied Scientist, AI/LLM · Seattle, WA

Research question working system.

Applied scientist and end-to-end builder. 3+ years at Microsoft training and evaluating LLMs, most recently RL for model behavior in complex tool use: agent orchestration and MCP invocation. Then co-founded a startup and shipped a production mobile app as founding engineer and technical lead. I move fast from decision to execution.

email available on request · linkedin.com/in/meni-brief · scholar.google.com/citations?user=t-P-tjgAAAAJ · semanticscholar.org/author/Meni-Brief/2217252086

experience

  1. ship(mobile_app → app_stores)

    Co-Founder & Technical Lead · Simply-Useful

    Oct 2025 – June 2026

    Founding engineer of a production-grade, mobile-first productivity app: from zero to live app-store releases with real users, leading a small team I hired. I own the system architecture end to end: Django backend on DigitalOcean, in-app AI processing, two-way sync with Google services, CI/CD on GitHub Actions, product analytics, and error monitoring, all on an AI-native development workflow that keeps a micro team shipping at production velocity.

  2. simulate(stripe, slack).replay()

    Agent Evaluation & Simulation · independent project

    2026

    Proof-of-concept eval platform for AI agents: high-fidelity clones of real software platforms (Stripe, Slack) as controlled simulation environments, plus a deterministic capture-and-replay harness for reproducible agent runs.

  3. rl.improve(tool_use, mcp)

    Senior Applied Scientist · Microsoft, Industry AI

    Jan 2024 – Oct 2025 · Redmond, WA

    Applied RL to improve LLM behavior in complex tool-use scenarios: agent orchestration and correct invocation of MCP tools. Led applied research on domain adaptation and knowledge injection: data curation, experiment design, training, evaluation, and results communication to internal and external stakeholders. Delivered LLM success stories in healthcare and financial services; co-authored research papers and one patent.

  4. research(llm.applications)

    Data & Applied Scientist · Microsoft

    Jul 2022 – Jan 2024 · Herzliya, IL

    Original research on LLM applications and capabilities across industries (PyTorch / Transformers / OpenAI), from experiment design through implementation; improved ML models running in production.

  5. segment(ultrasound) → fda_cleared

    Data Science Intern · GE Healthcare

    Apr 2021 – Jul 2022

    Built deep-learning segmentation models for ultrasound imaging; the resulting tool (CNerve) passed FDA requirements for AI in healthcare. Served as data owner and collaborated directly with physicians.

research

Fine-Tuning or Retrieval? Comparing Knowledge Injection in LLMs

co-first author · EMNLP 2024, main conference

A systematic comparison of unsupervised fine-tuning and retrieval-augmented generation for injecting knowledge into LLMs, across knowledge-intensive tasks, including entirely new facts models never saw in pre-training.

[patent] One pending patent from applied LLM work at Microsoft.
[thesis] “Diffusion Models: Theory and Mechanisms” (MSc thesis, advised by Prof. Tamir Hazan, Technion).
[more] Additional applied-LLM publications in healthcare and financial services.

skills

Research
LLM post-training & RL for tool use · agents & MCP · evaluation design · domain adaptation · diffusion models · PyTorch · HuggingFace · Transformers · vLLM · Classic ML and data wrangling
Engineering
Python (native) · SQL · C/C++ · TypeScript · React Native (iOS + Android) · Django · CI/CD (GitHub Actions) · Docker · DigitalOcean · PostHog · Sentry · AI-native tooling (Claude Code, Codex)
Languages
English & Hebrew (native) · Spanish (conversational) · Levantine Arabic (conversational)

education

Technion – Israel Institute of Technology

fast-track BSc+MSc honors program

MSc in Data Science (GPA 91.4). BSc in Information Systems Engineering, cum laude, #3 in class (GPA 90.6), with minors in Economics and Fintech.